I'm using the iCloud's free 5GB to backup some of my data from my iPhone. Recently, iCloud has been prompting that it's not able to perform backups because my iCloud is full.
I checked my iCloud account, and it seems like the backups took about 3GB. However, it is complaining that I'm left with only 171.92mb of storage.
I don't know how iCloud does its math because adding up all of those items in the screenshot above doesn't accumulate to 5GB.
How else can I know what was stored on my iCloud account that is occupying that other 2GB of storage? What could have happened to my iCloud account?
I'm using Windows 7 with iCloud for Windows to see the screenshot above.